The chip I use is the ADF7020, which can communicate at 915Mhz. now I want to switch to 460Mhz by setting the vco_band of R1 to 1, and the other configuration remains the same, but it fails.In addition to the hardware adjustments, is there any problem with my configuration?
When I entered the same front panel values I got the below. Note your PA output power setting turns off the transmitter.
First of all, thank you very much for your reply!But I have to say that your configuration is not exactly the same as mine:my crystal frequency is not equal to PFD frequency.According to my understanding, this should not be the cause of the problem. If you have other suggestions, please let me know.
I have changed frequency to 436MHz(431~440MHz),and it turns out ok. But when I changed frequency to 460MHz(440~478MHz),it failed.I don't know why. If there is new progress, I will update it again.You can also put your suggestions here.
Hi! Communication on 460MHz is doable in EVAL-ADF7020DBZ1 using config software. What you mean by fail - is it high frequency error, or is the device not transmitting anything? Try implementing your settings using any ADF7020 daughter board. If your settings work on the daughter board, then please consult your design to your local FAE.